Dabsyl-Leu-Gly-Gly-Gly-Ala-Edans is afluorophore Dabsyl-labeled peptide. Dabsyl-Leu-Gly-Gly-Gly-Ala-Edans can be used to test the peptidase activity of the LasA protease of Pseudomonas aeruginosa. Dabsyl-Leu-Gly-Gly-Gly-Ala-Edans has enzyme specificity and has application value.